US6001116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endoscopic shaver blade with resilient cutting edges
Assignee: Linvatec Corp
•
Filing: 1998-04-01
•
Granted: 1999-12-14
•
Expires: 2018-04-01
Abstract
Abstract A rotating endoscopic shaver blade assembly adapted for side-cutting and end-cutting. A pair of longitudinally extending, symmetrical fingers extends from the distal end of an elongated tubular inner member and are juxtaposed adjacent a window at the distal end of an elongated tubular outer member. Each of the fingers is provided with laterally facing and transversely facing cutting edges and has a curvilinear profile terminating at a distal tip. The distal tips of the fingers are separated by an axially aligned gap which enables limited stress-relieving radial movement of the fingers.
Inventors
- 👤 Gary R. Heisler
- 👤 Robert A. Van Wyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:30
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B17/32002
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
156 words
A surgical rotating shaver blade assembly comprising: an elongated outer tubular member having an axis, a distal end, a proximal end and an opening at said distal end; an elongated inner tubular member co-axially aligned and adapted to move within said outer tubular member and having a cylindrical body with a distal end and a proximal end; a cutting means at said distal end of said inner tubular member for cutting tissue presented through said opening, said cutting means comprising at least two diametrically opposed finger members extending longitudinally from said distal end of said inner tubular member, each of said finger members comprising: a body having a proximal portion and a distal portion, said proximal portion being longitudinally extending and joined to the cylindrical body of said inner tubular member, said distal portion joined to said proximal portion and transversely and longitudinally extending therefrom to a terminating point spaced a predetermined distance from said axis.
Claim 2
Dependent Claim
156 words
A surgical rotating shaver blade assembly comprising: an elongated outer tubular member having an axis, a distal end, a proximal end and an opening at said distal end; an elongated inner tubular member co-axially aligned and adapted to move within said outer tubular member and having a cylindrical body with a distal end and a proximal end; a cutting means at said distal end of said inner tubular member for cutting tissue presented through said opening, said cutting means comprising at least two diametrically opposed finger members extending longitudinally from said distal end of said inner tubular member, each of said finger members comprising: a body having a proximal portion and a distal portion, said proximal portion being longitudinally extending and joined to the cylindrical body of said inner tubular member, said distal portion joined to said proximal portion and transversely and longitudinally extending therefrom to a terminating point spaced a predetermined distance from said axis.
Claim 3
Dependent Claim
18 words
A shaver blade assembly according to claim 1 wherein said proximal portion of said body is transversely arcuate.
Claim 4
Dependent Claim
23 words
A shaver blade assembly according to claim 1 wherein said proximal and distal portions are each integrally formed with said inner tubular member.
Claim 5
Dependent Claim
21 words
A shaver blade assembly according to claim 1 wherein said proximal portion subtends a predetermined arcuate distance of less than 180°.
Claim 6
Dependent Claim
45 words
A shaver blade assembly according to claim 1 further comprising: at least one laterally facing and longitudinally extending cutting edge provided on said proximal portion of said body; at least one longitudinally and transversely extending cutting edge provided on said distal portion of said body.
Claim 7
Dependent Claim
55 words
A shaver blade assembly according to claim 1 wherein said outer tubular member has a proximally facing distal end wall portion on its axis and wherein a predetermined part of said distal portion of said finger body abuts a predetermined part of said proximally facing distal end wall portion to form a bearing contact area.
Claim 8
Dependent Claim
124 words
A cutting tip for a surgical instrument having a tubular, cylindrical body having a distal end and a proximal end, said proximal end having a rotatable shaft joined axially thereto, said cutting tip comprising: at least two diametrically opposed, transversely arcuate, axially symmetrical finger members extending longitudinally from said distal end of said cylindrical body, each of said finger members comprising: a transversely arcuate body having a proximal portion and a distal portion, said proximal portion being longitudinally extending and joined to said distal end of said cylindrical body and subtending a predetermined arcuate distance of less than 180°, said distal portion joined to said proximal portion and transversely and longitudinally extending therefrom to a terminating point spaced a predetermined distance from said axis.
Claim 9
Dependent Claim
124 words
A cutting tip for a surgical instrument having a tubular, cylindrical body having a distal end and a proximal end, said proximal end having a rotatable shaft joined axially thereto, said cutting tip comprising: at least two diametrically opposed, transversely arcuate, axially symmetrical finger members extending longitudinally from said distal end of said cylindrical body, each of said finger members comprising: a transversely arcuate body having a proximal portion and a distal portion, said proximal portion being longitudinally extending and joined to said distal end of said cylindrical body and subtending a predetermined arcuate distance of less than 180°, said distal portion joined to said proximal portion and transversely and longitudinally extending therefrom to a terminating point spaced a predetermined distance from said axis.
Claim 10
Dependent Claim
160 words
A cutting tip for a rotatable surgical instrument having an outer, tubular stationary body, an inner tubular, cylindrical body rotatable within said outer body, said cutting tip comprising: an outer distal tip attached to said outer stationary tubular body, said outer tip having a proximal end, a distal end and an opening at said distal end in its side and end wall, said opening having a first cutting edge around its periphery; an inner distal tip attached to said inner rotatable tubular body, said inner tip having a proximal end, a distal end and a pair of longitudinally extending fingers extending from said distal end, a second cutting edge formed on the periphery of one of said fingers and a third cutting edge formed on the periphery of the other of said fingers, said second and third cutting edges being spaced from each other on opposite sides of an imaginary plane extending through the axis of said inner distal tip.
Claim 11
Dependent Claim
160 words
A cutting tip for a rotatable surgical instrument having an outer, tubular stationary body, an inner tubular, cylindrical body rotatable within said outer body, said cutting tip comprising: an outer distal tip attached to said outer stationary tubular body, said outer tip having a proximal end, a distal end and an opening at said distal end in its side and end wall, said opening having a first cutting edge around its periphery; an inner distal tip attached to said inner rotatable tubular body, said inner tip having a proximal end, a distal end and a pair of longitudinally extending fingers extending from said distal end, a second cutting edge formed on the periphery of one of said fingers and a third cutting edge formed on the periphery of the other of said fingers, said second and third cutting edges being spaced from each other on opposite sides of an imaginary plane extending through the axis of said inner distal tip.
Claim 12
Dependent Claim
83 words
A shaver blade for a rotating surgical shaver assembly comprising an elongated cylindrical body having an axis, a distal tip with a distal end and a first cutting edge formed in said distal tip, said first cutting edge defined by the locus of points at the intersection of the cylindrical outer surface of said body and a first curved surface lying in a contour all points of which are parallel to an imaginary plane through the axis of said body and spaced therefrom.
Claim 13
Dependent Claim
83 words
A shaver blade for a rotating surgical shaver assembly comprising an elongated cylindrical body having an axis, a distal tip with a distal end and a first cutting edge formed in said distal tip, said first cutting edge defined by the locus of points at the intersection of the cylindrical outer surface of said body and a first curved surface lying in a contour all points of which are parallel to an imaginary plane through the axis of said body and spaced therefrom.
Claim 14
Dependent Claim
20 words
A shaver blade according to claim 9 wherein said contour is a plane spaced a predetermined distance from said axis.
Claim 15
Dependent Claim
56 words
A shaver blade according to claim 9 further comprising four said cutting edges, two of said cutting edges on one side of said imaginary plane and defined by the locus of points on the intersection of the cylindrical outer surface of said body with said contour in two locations arcuately spaced along said cylindrical outer surface.
Claim 16
Dependent Claim
54 words
A shaver blade according to claim 9 wherein said contour is spaced from said axis by a first predetermined distance at its proximal end, a second predetermined distance at its distal end and a third predetermined distance at an intermediate point, said third predetermined distance being greater than said first and second predetermined distances.
Claim 17
Dependent Claim
21 words
A shaver blade according to claim 12 wherein said second predetermined distance is less than the radius of said cylindrical body.
Claim 18
Dependent Claim
21 words
A shaver blade according to claim 9 wherein said first curved surface includes portions on each side of said imaginary plane.
Claim 19
Dependent Claim
18 words
A shaver blade according to claim 14 wherein said portions are symmetrically situated relative to said imaginary plane.
Claim 20
Dependent Claim
13 words
A shaver blade according to claim 9 wherein said distal end is rounded.
References Cited (Backward Citations)
US3732858A
Cited
US3844272A
Cited
US3882872A
Cited
US3945375A
Cited
US4167943A
Cited
US4274414A
Cited
US4620547A
Cited
US4649919A
Cited
US4834729A
Cited
US4850354A
Cited
WO1989002250A1
Cited
US4844088A
Cited
US5123904A
Cited
US5112299A
Cited
US5007917A
Cited
US5630826A
Cited
US5527331A
Cited
US5423844A
Cited
US5489291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-12-13 | 2003-06-14 | 2003-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-13 | 2007-06-14 | 2007-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-13 | 2011-06-14 | 2011-12-14 | $7700.00 | Window Closed / Lapsed |